In this journal post I will be collecting every project that I think people should consider joining into one masterpost. I tried to get only world-wide projects, but unfortunately, a few of them are restricted to North America.
Evidence Type Projects
These projects deal with the type of evidence presented in an observation.
Bites and Stings collects observations that have come along with a bite or a sting from the subject of observation.
Cicada Exuviae is for the shed skins of cicadas.
Dead Animals is an umbrella project for observations of deceased animals. It's composed of four other projects: Dead Birds, Dead Fish, Dead Herps, and Dead Mammals
Eggs and Nests is for eggs, nests, or nests with eggs in them. It is not restricted to birds.
Found Feathers is a project for observations of feathers
Galls of North America is a project for observations of galls, deformed masses made in plants by some arthropods
Lone Cones is a project for observations of cones without photos of the plant that produced them.
North American Leafminers is an umbrella project consisting of several location-restricted leafminer projects. Leafminers are insects whose larvae make lines and blotches in leaves. With the host plant, these can often be identified.
Skulls and Bones is for skulls, bones, and skeletons as a whole
Behaviour and Interaction Projects
These projects showcase an organism's unique behaviours, or the interesting interactions between organisms
Common Dandelion Visitors is for observations of animals interacting with dandelions. This can be as a fly on the dandelion's flower, or it could be a deer pulling up and eating the whole plant.
Flower-Visiting Wasps of the US and Canada is for observations of wasps visiting flowers. Unfortunately, it's restricted to the two aforementioned countries.
Hand Feeding is a project for observations of nonhuman animals eating out of a human's hand.
Mating Behaviour is for observations of animal courtship or mating
Molluscan Mycophagy is for observations of terrestrial gastropods (slugs and snails) eating fungi (mostly mushrooms)
Parasitic and Phoretic Mites is for mites (and ticks) on other animals
Pollinator Associations is for any observation of an animal visiting a flower.
Salticidae Meals is for observations of salticids (jumping spiders) eating other arthropods.
Location and Habitat Related Projects
These projects are about where something was seen. I'm purposely not adding region-based projects to this section. Instead, these are moreso about habitat or interaction with human development.
Animals in Swimming Pools is for animals in swimming pools. They can be dead or alive.
Animals in the Backyard is for animals in backyards.
Animals in Urbania is for animals in "highly human-dominated landscapes".
Beach Finds and Washashore is for observations of things found in wrack lines.
Bird Feeders is for visitors of bird feeders. This is not restricted to birds. (Additionally, check out the Humans Feeding Animals umbrella project)
Freshwater Habitat is for anything found in freshwater, excluding wetlands. So far, it's mostly only been used in New Zealand, but there's no rule against adding outside observations.
Intertidal Zone is for animals and algae between the areas of high and low tide. So far, it's mostly only been used in New Zealand, but there's no rule against adding outside observations.
Never Home Alone: the Wild Life of Homes is for observations of non-human animals living in human households.
Project PorchLight is for animals visiting porch lights during the nighttime.
WildMart is for observations of animals found in walmart and other large stores. The goal is to spot newly introduced species as they're imported into the country, hidden within products such as exotic fruit and plants.
Projects for Observations of Peculiar Things
This is for observations that have some peculiar attribute to them that make them worth paying attention to
Amazing Aberrants is for observations of an individual that has different colouration than the majority of its species.
Banded Birds is for observations of birds that are banded, tagged, ringed, or tracked in some other way.
Fascinating Fasciation is for plants that are fasciated - they've grown in an atypical manner. The project has great examples of what fasciation is.
Observations With a Good View is for observations with a pleasant scene behind the subject.
Peculiar Petals is for plants whose flowers have an amount of petals atypical for the species.
Pink Common Yarrow Observations is for wild common yarrow (Achillea millefolium) with pink flowers instead of the more typical white.
Wild Hybrid and Integrade Birds of North America is a North America-restricted project for observations of birds that are hybrid or integrade (cross between subspecies of the same species).
Projects About How an Observation was Observed
These projects are about the how of the observation. How was this particular observation made?
Animated Observations is for observations that use .gif files, instead of just the typical .png and .jpg files.
Audio Observations From Around the World is for observations that use .mp3, .wav, or similar audio files instead of just image files.
Ethaning is for observations with photos that were taken from within a moving vehicle. The name originated from an iNat user who often creates such observations. Any vehicle is allowed, be it car, boat, gondola, helicopter, or anything else.
Nature Drawing and Journaling is for observations that use a drawing or sketch of an organism, instead of or along with a photo of the organism itself.
Humorous Projects
These lighthearted projects are for fun observations
Debatably an Organism is for observations that are such low quality that you can barely tell that it's a living thing, yet can still attain research grade.
Geralds of the World is for any observation that makes you laugh, or just any observation that you want to add to the project. It's inspired by Gerald, the beaver with over 100 IDs
Observational comedy is for any comedic observation.
Organisms On or Near Appropriate Signs is for organisms that are on, or near, appropriate signs.
The Butt End of Nature is for observations where you can only successfully photograph your subject from behind.
Other Projects
These are projects that I couldn't fit into any of the above categories. Many of them are for organisms of species that fit into a somewhat arbitrary category.
Ant Mimics is for organisms that mimic ants.
Flowering Fugitives is for plants that have escaped from the horticultural trade.
Megafauna of the World is an umbrella project for species that get above 40kg.
Non-Apid Bees is a collection project for bees that are not in the family Apidae. This project is most useful as a search filter on the explore page.
Moths of the World is a collection project for moths (lepidopterans that aren't butterflies). This project is most useful as a search filter on the explore page.
I'm always willing to add new projects to this page. If you have an interesting one, send it to me!
